近些年,不等式恒成立求参数取值范围的问题在高考压轴题中悄然升温.众所周知,解决此类问题,通常有两条途径:一是利用分类讨论思想,通过对参数的缜密讨论,确定参数的取值范围;二是利用分离参数法,将所求变量与其他变量分离开来,通过研究其他变量构成的解析式的性质来确定所求变量的取值范围.笔者在复习该部分时一直坚持两法并举,择其优者解之.可在使用分离参数法时,往往会有许多不寻常的遭遇.此时应如何寻 In recent years, the inequality has always been established to seek the value of the parameter range of questions quietly heating up the pressure axis in the entrance. As we all know, to solve such problems, there are usually two ways: First, the use of taxonomy discussion, through careful discussion of parameters to determine Parameter range of values; the second is the use of separation parameter method, the variables are separated from other variables, by studying the other variables constitute the analytic nature of the variables to determine the scope of the value of the author in the review section Has always insisted on the two law simultaneously, choose its excellent solution.While using the separation parameter method, often there will be many unusual encounters.